Case Studies

South African wastewater facility saves energy and meets nutrient removal regulations Many small communities across the U.S. and around the globe are struggling to meet more stringent nitrification of ammonia requirements on a tighter budget. When a South African community could not meet its state requirements and struggled with a failing rotor disc system, the […]

Brush Rotor Icing Problems Solved: Aerator Upgrades Help Wastewater Treatment Plant Survive Cold Vermont Winters More than two decades ago, cold Vermont winters brought a small wastewater treatment plant to a halt with brush rotor icing problems. A major upgrade that included the Aire-O2® aspirator aeration system not only ended the wintertime blues but helped the municipality gain the flexibility […]

City needed a system that would weather the Upper Peninsula’s harsh winters This Wastewater Treatment Plant in Michigan sits on the shores of rugged and picturesque Lake Superior in the state’s Upper Peninsula. When the city needed to replace an aging system, they chose the Tri-Oval® oxidation ditch system for its overall costs savings, process control and operational […]

South Dakota facility retrofits advanced process control system Nearly 25 years ago, the consulting engineering firm Banner & Associate, Inc. designed an efficient wastewater treatment facility for a city in S.D. that featured process control, flexibility and treatment efficiency while minimizing operating and maintenance costs. Key to the system was the aspirator aeration system that supplied reliable […]

 …Guaranteed! Since 1984, the Aire-O2® system has provided efficient oxygen transfer, good mixing, and easy maintenance even in severe winter conditions Problem This Midwestern, USA city wanted to replace an aging trickling filter system with a new, efficient wastewater treatment facility equipped to handle its future growth. Important factors in design were loading demand fluctuations, winter treatment efficiency, […]